Chesterton, G. K. (1957). St. Francis of Assisi. Image Books.
芝加哥风格引文Chesterton, Gilbert Keith. St. Francis of Assisi. Garden City, N.Y: Image Books, 1957.
MLA引文Chesterton, Gilbert Keith. St. Francis of Assisi. Image Books, 1957.
警告：这些引文格式不一定是100％准确.